That's for God to judge ... “Vengeance is mine, I will repay, says the Lord.”
Meanwhile, she has been tried, convicted, and sentenced ... I may not agree with the severity of the sentence, but it is done.
Carrying a grudge against those who have wronged me isn't worth the trouble. Best to consign them to God's mercy and justice, and work on bettering my life. It's hard to do ... Satan is right there, hissing "Yesssss ... let the hate flow through you ...." Tell that old snake to begone. Jesus, I trust in you.
You can let it go. I have done so and stayed away from that offender, letting him fail on his own, without me.
Sometimes outliving such a person can be all the difference. No more threat of harm from him to me or loved ones.